Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 15,878.8
Reclassified out of AOCI	$ 38.3	$ (26.9)	(28.7)	$ 38.4
Net other comprehensive (loss) income	139.8	(159.8)	(111.5)	15.8
Ending balance	18,663.6	16,023.1	18,663.6	16,023.1
Derivative Contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	16.8	(13.5)	(11.0)	35.1
Recorded into AOCI	(43.1)	57.5	53.2	(55.8)
Reclassified out of AOCI	36.8	(27.7)	(31.7)	37.0
Net other comprehensive (loss) income	(6.3)	29.8	21.5	(18.8)
Ending balance	10.5	16.3	10.5	16.3
Marketable Debt Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(13.8)	(40.8)	(13.9)	(43.6)
Recorded into AOCI	27.5	2.2	28.9	6.7
Reclassified out of AOCI	(0.7)	(0.4)	(2.0)	(2.1)
Net other comprehensive (loss) income	26.8	1.8	26.9	4.6
Ending balance	13.0	(39.0)	13.0	(39.0)
Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(102.6)	(108.0)	(110.3)	(110.9)
Recorded into AOCI		(0.5)	4.9	0.1
Reclassified out of AOCI	2.2	1.2	5.0	3.5
Net other comprehensive (loss) income	2.2	0.7	9.9	3.6
Ending balance	(100.4)	(107.3)	(100.4)	(107.3)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(845.6)	(615.5)	(558.7)	(834.0)
Recorded into AOCI	117.1	(192.1)	(169.8)	26.4
Net other comprehensive (loss) income	117.1	(192.1)	(169.8)	26.4
Ending balance	(728.5)	(807.6)	(728.5)	(807.6)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(945.2)	(777.8)	(693.9)	(953.4)
Recorded into AOCI	101.5	(132.9)	(82.8)	(22.6)
Reclassified out of AOCI	38.3	(26.9)	(28.7)	38.4
Net other comprehensive (loss) income	139.8	(159.8)	(111.5)	15.8
Ending balance	$ (805.4)	$ (937.6)	$ (805.4)	$ (937.6)